dawidwys commented on a change in pull request #15771:
URL: https://github.com/apache/flink/pull/15771#discussion_r620945438
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File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/AbstractStreamOperatorV2.java
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@@ -268,7 +296,11 @@ protected boolean isUsingCustomRawKeyedState() {
* @throws Exception An exception in this method causes the operator to
fail.
*/
@Override
- public void open() throws Exception {}
+ public void open() throws Exception {
+ this.watermarkOutputMultiplexer =
+ setupWatermarkMultiplexer(
+ containingTask.getStreamStatusMaintainer(),
numberOfInputs);
+ }
Review comment:
Fully agree, the problem is that the
`containingTask.getStreamStatusMaintainer()` is not set until the `open` method.
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